Valve just did some updates to DoD by adding a new map, achievements, and some other little things.
Seems like a good deal for $4.99.
http://storefront.steampowered.com/v/index.php?area=app&AppId=300&cc=US&client=1
Seems like a good deal for $4.99.
http://storefront.steampowered.com/v/index.php?area=app&AppId=300&cc=US&client=1